<template>
  <div :style="bg">
    <el-backtop  />
    <div style="padding: 10px">
      <!--    功能区域-->
      <div style="margin: 10px 0">
        <el-button type="primary" @click="add" v-if="user.role === 1">上架书籍</el-button>
        <el-upload
                action="http://150.158.98.218:9090/book/import"
                :on-success="handleUploadSuccess"
                :show-file-list=false
                :limit="1"
                accept='.xlsx'
                style="display: inline-block; margin: 0 10px"
        >
          <el-button type="primary" v-if="user.role === 1" >导入</el-button>
        </el-upload>
        <el-button type="primary" @click="exportUser">导出</el-button>
        <el-popconfirm
                v-if="user.role === 1"
                title="确定删除吗？"
                @confirm="deleteBatch"
        >
          <template #reference>
            <el-button type="danger" >批量删除</el-button>
          </template>
        </el-popconfirm>

      </div>

      <!--    搜索区域-->
      <div style="margin: 10px 0">
        <el-input v-model="search" placeholder="请输入书籍名称查询" style="width: 20%" clearable></el-input>
        <el-button type="primary" style="margin-left: 5px" @click="load">查询</el-button>
      </div>
      <el-table
              v-loading="loading"
              :data="tableData"
              border
              stripe
              style="width: 100%"
              @selection-change="handleSelectionChange"
      >
        <el-table-column
                type="selection"
                width="55">
        </el-table-column>
        <el-table-column
                prop="id"
                label="ID"
                sortable
        >
        </el-table-column>
        <el-table-column
                prop="name"
                label="名称">
        </el-table-column>
        <el-table-column
                prop="price"
                label="单价">
        </el-table-column>
        <el-table-column
                prop="stock"
                label="库存">
        </el-table-column>
        <el-table-column
                prop="author"
                label="作者">
        </el-table-column>
        <el-table-column
                prop="createTime"
                label="出版时间">
        </el-table-column>
        <el-table-column
                prop="category"
                label="图书类别">
        </el-table-column>
        <el-table-column
                label="封面">
          <template #default="scope">
            <el-image
                    style="width: 100px; height: 100px"
                    :src="scope.row.cover"
                    :preview-src-list="[scope.row.cover]">
            </el-image>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="210">
          <template #default="scope">
            <el-button type="primary" size="mini" @click="buy(scope.row.id)" v-if="user.role === 0">购买</el-button>
            <el-button size="mini" @click="handleEdit(scope.row)" v-if="user.role === 1">编辑</el-button>
            <el-button type="success" size="mini"  v-if="user.role === 0" @click="handleBorrow(scope.row)">借阅</el-button>
            <el-popconfirm confirm-button-text="是"
                           cancel-button-text="否"
                           :icon="InfoFilled"
                           icon-color="red"
                           title="确定删除吗?" @confirm="handleDelete(scope.row.id)" v-if="user.role === 1">
              <template #reference>
                <el-button size="mini" type="danger">下架书籍</el-button>
              </template>
            </el-popconfirm>
          </template>
        </el-table-column>
      </el-table>

      <div style="margin: 10px 0">
        <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="currentPage"
                :page-sizes="[5, 10, 20]"
                :page-size="pageSize"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total">
        </el-pagination>

        <el-dialog title="提示" v-model="dialogVisible" width="30%" >
          <el-form :model="form" label-width="120px">
            <el-form-item label="名称" >
              <el-input v-model="form.name" style="width: 80%" ></el-input>
            </el-form-item>
            <el-form-item label="价格">
              <el-input v-model="form.price" style="width: 80%"></el-input>
            </el-form-item>
            <el-form-item label="库存">
              <el-input v-model="form.stock" style="width: 80%"></el-input>
            </el-form-item>
            <el-form-item label="作者">
              <el-input v-model="form.author" style="width: 80%"></el-input>
            </el-form-item>
            <el-form-item label="出版时间">
              <el-date-picker v-model="form.createTime" value-format="YYYY-MM-DD" type="date" style="width: 80%" clearable></el-date-picker>
            </el-form-item>
            <el-form-item label="图书类别">
              <el-input v-model="form.category"  style="width: 80%" ></el-input>
            </el-form-item>
            <el-form-item label="封面">
              <el-upload ref="upload" :action="filesUploadUrl" :on-success="filesUploadSuccess">
                <el-button type="primary">点击上传</el-button>
              </el-upload>
            </el-form-item>
          </el-form>
          <template #footer>
          <span class="dialog-footer">
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="save">确 定</el-button>
          </span>
          </template>
        </el-dialog>

        <el-dialog title="借阅" v-model="Borrow" width="30%" >
          <el-form :model="borrow" label-width="120px">
            <el-form-item >
              <el-input v-model="borrow.userId"   style="width: 80%;" type="hidden" ></el-input>
            </el-form-item>
            <el-form-item >
              <el-input v-model="borrow.state"   style="width: 80%;" type="hidden" ></el-input>
            </el-form-item>
            <el-form-item  >
              <el-input v-model="borrow.bookId" style="width: 80%" type="hidden" ></el-input>
            </el-form-item>
            <el-form-item label="名称" >
              <el-input v-model="borrow.bookName"  style="width: 80%" disabled ></el-input>
            </el-form-item>
            <el-form-item label="借阅人">
              <el-input v-model="borrow.userName" style="width: 80%" disabled>{{form.nickName}}</el-input>
            </el-form-item>
            <el-form-item label="借阅时间">
              <el-date-picker  v-model="borrow.borrowTime" value-format="YYYY-MM-DD" type="date" style="width: 80%" clearable ></el-date-picker>
            </el-form-item>
            <el-form-item label="归还时间">
              <el-date-picker v-model="borrow.backTime" value-format="YYYY-MM-DD" type="date" style="width: 80%" clearable ></el-date-picker>
            </el-form-item>
          </el-form>
          <template #footer>
          <span class="dialog-footer">
            <el-button @click="Borrow = false">取 消</el-button>
            <el-button type="primary" @click="borrowNow">借  阅 </el-button>
          </span>
          </template>
        </el-dialog>
      </div>
    </div>
  </div>
</template>

<script>


import request from "@/utils/request";

export default {
  name: 'Book',
  components: {

  },
  data() {
    return {
      bg: {
        width:"100%",
        backgroundImage:'url(' + require('../assets/background.jpg') + ')',
        backgroundRepeat: "no-repeat",
        backgroundSize: "100% 100%"
      },
      user: {},
      loading: true,
      form: {},
      borrow: {},
      dialogVisible: false,
      Borrow: false,
      search: '',
      currentPage: 1,
      pageSize: 10,
      total: 0,
      tableData: [],
      filesUploadUrl: window.server.filesUploadUrl + ":9090/files/upload",
      ids: []
    }
  },
  created() {
    let userStr = sessionStorage.getItem("user") || "{}"
    this.user = JSON.parse(userStr)
    // 请求服务端，确认当前登录用户的 合法信息
    request.get("/user/" + this.user.id).then(res => {
      if (res.code === '0') {
        this.user = res.data
      }
    })

    this.load()
  },
  methods: {
    buy(bookId) {
      request.get("/order/buy/" + bookId).then(res => {
        if (res.code === '1'){
          this.$message.error(res.msg)
          return
        }
        // 请求成功跳转沙箱支付的页面
        window.open(res.data)
      })
    },
    deleteBatch() {
      if (!this.ids.length) {
        this.$message.warning("请选择数据！")
        return
      }
      request.post("/book/deleteBatch", this.ids).then(res => {
        if (res.code === '0') {
          this.$message.success("批量删除成功")
          this.load()
        } else {
          this.$message.error(res.msg)
        }
      })
    },
    handleSelectionChange(val) {
      this.ids = val.map(v => v.id)   // 实现数组的转换[{id,name}, {id,name}] => [id,id]

    },
    filesUploadSuccess(res) {
      console.log(res)
      this.form.cover = res.data
    },
    load() {
      this.loading = true
      request.get("/book", {
        params: {
          pageNum: this.currentPage,
          pageSize: this.pageSize,
          search: this.search
        }
      }).then(res => {
        this.loading = false
        this.tableData = res.data.records
        this.total = res.data.total
      })
    },
    add() {
      this.dialogVisible = true
      this.form = {}
      if (this.$refs['upload']) {
        this.$refs['upload'].clearFiles()  // 清除历史文件列表
      }
    },
    handleUploadSuccess(res) {
      if (res.code === "0") {
        this.$message.success("导入成功")
        this.load()
      }
    },
    exportUser() {
      location.href = window.server.filesUploadUrl + ":9090/book/export";
    },
    borrowNow(){
      if (!this.borrow.borrowTime) {
        this.$message.warning("请选择借阅时间！")
        return
      }
      if (!this.borrow.backTime) {
        this.$message.warning("请选择归还时间！")
        return
      }
      if (this.borrow.backTime < this.borrow.borrowTime) {
        this.$message.warning("归还时间不能小于借阅时间！")
        return
      }
      request.post("/borrow", this.borrow).then(res => {
        console.log(res)
        if (res.code === '0') {
          this.$message({
            type: "success",
            message: "借阅成功"
          })
        } else {
          this.$message({
            type: "error",
            message: res.msg
          })
        }
        this.load() // 刷新表格的数据
        this.Borrow = false  // 关闭弹窗
      })
    },
    save() {
      if (this.form.id) {  // 更新
        request.put("/book", this.form).then(res => {
          console.log(res)
          if (res.code === '0') {
            this.$message({
              type: "success",
              message: "更新成功"
            })
          } else {
            this.$message({
              type: "error",
              message: res.msg
            })
          }
          this.load() // 刷新表格的数据
          this.dialogVisible = false  // 关闭弹窗
        })
      }  else {  // 新增
        request.post("/book", this.form).then(res => {
          console.log(res)
          if (res.code === '0') {
            this.$message({
              type: "success",
              message: "新增成功"
            })
          } else {
            this.$message({
              type: "error",
              message: res.msg
            })
          }

          this.load() // 刷新表格的数据
          this.dialogVisible = false  // 关闭弹窗
        })
      }
    },
    handleEdit(row) {
      this.form = JSON.parse(JSON.stringify(row))
      this.dialogVisible = true
      this.$nextTick(() => {
        if (this.$refs['upload']) {
          this.$refs['upload'].clearFiles()  // 清除历史文件列表
        }
      })

    },
    handleBorrow(row) {
      this.form = JSON.parse(JSON.stringify(row))
      this.Borrow = true
      this.borrow.state = 1
      this.borrow.bookId = this.form.id
      this.borrow.userId = this.user.id
      this.borrow.bookName =this.form.name
      this.borrow.userName = this.user.nickName
      this.$nextTick(() => {
        if (this.$refs['upload']) {
          this.$refs['upload'].clearFiles()  // 清除历史文件列表
        }
      })

    },
    handleDelete(id) {
      console.log(id)
      request.delete("/book/" + id).then(res => {
        if (res.code === '0') {
          this.$message({
            type: "success",
            message: "删除成功"
          })
        } else {
          this.$message({
            type: "error",
            message: res.msg
          })
        }
        this.load()  // 删除之后重新加载表格的数据
      })
    },
    handleSizeChange(pageSize) {   // 改变当前每页的个数触发
      this.pageSize = pageSize
      this.load()
    },
    handleCurrentChange(pageNum) {  // 改变当前页码触发
      this.currentPage = pageNum
      this.load()
    }
  }
}
</script>
<style>
*::-webkit-scrollbar{
  width: 0;
  height: 0;
}
</style>